Pulverizer



Patented Feb. 10, 1925.

ten STATES PATENT OFFICE.

JOSEPH MOLZ, OF OBERHAUSEN, GERMANY, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

- PULVEBEZER.

Application filed May 12,

To all whom it may concern:

Be it known that I, JosEPH Monz, a citizen of the Republic of Germany, residing at Markstrasse 128, Oberhausen, Rhineland, Germany, have invented certain new and useful Improvements in Pulverizers, of which the following is a specification.

My invention relates to improvements in pulverizing mills for coal and the like, and will best be understood from the following description taken with the annexed drawings, in which Fig. 1 is a view in longitudinal section of the illustrative embodiment of my invention; Figs. 2 and 3 are sectional views taken respectively along the lines IIII and IIIHI of Fig. 1.

In the drawings there is represented a pulverizer having a central shaft 1 upon which are arranged a plurality of pulverizing devices 2' in a manner well known in the art. As shown, pulverizing devices 2 operate within chambers 3 which may be of varying sizes. The chambers 3 are arranged in a casing which in the embodiment shown, is made up of sections 4 and 4: permitting the device to be more or less easily disassembled. The casing 4;, 4 is provided with a jacket 5 affording spaces 5 which surround chambers 3.

Heated air may be introduced into the jacket spaces ti -through the conduit 6 and communicating ducts 6, the latter being shown most clearly in Fig. 3. If desired,

, the heated air from the casing surrounding the ignition head of the burner utilizing the pulverized fuel may be used. In order that the air may be utilized for heating the coal or other material undergoing pulverization, means is provided for admitting this air into the pulverizing chambers 3 in the form of openings 7 and 8. These openings, particularly the openings 7, are preferably made regulatable, as is shown in Fig. 2.

Referring to said figure, there is provided an annular rotatable member 9 held in lace by means of guides 10, the member 9 eing manipulated by a handle 11. The member 9 has openings 7 which are registerable with the openings or ports 7 in casing 4 the member 9 when the handle 11 is moved thus serves to control the air admitted to the casing. A' further regulating means for the amount of air admitted, is provided in the form of a dam er 12 in the conduit 6.

By heating the w ole pulverizing mill by 1924. Serial No. 712,871.

complished. As a result, the coal is-dried to such an extent that it can be conveniently pulverized, while damp particles of coal are dried and thus no longer adhere the walls of, the mill. Furthermore, further moisture from the coal is removed by the air which enters the mill through the openings in the casings 4 and 4. The coal is heated thereby and enters the furnace in a condition in which it is more easily ignited.

I claim: 7

1. A pulverizing mill for coal and the like, comprising a casing enclosing a pulverizing chamber, pulverizer elements in said chamber, a jacket surrounding said cas ing and affording spaces between said casing and the jacket, means for introducing a heating medium into said spaces, said casing being provided with openings through which the heating medium may be admitted from said spaces into the pulverizing chamber in direct contact with the material undergoing pulverization.

2. Apulverizing mill for coal and the like, comprising a casing enclosing a pulverizing chamber, pulverizer elements in said chamber, a jacket surrounding said casing and adording spaces between said casing and the jacket, means for introducing a heating medium into said spaces, said cas-' ing being provided with-openings through which the heating medium may be admitted from said spaces into the pulverizin chamber in direct contact with the materia undergoing pulverization, and means for controlling said openings.

3. A pulverizing mill for coal and the like, comprising a casing enclosing a pulverizing chamber, pulverizer elements in said chamber, a jacket surrounding said casing and aifording spaces between said casing and the jacket, and means for admitting like comprising a casing enclosing a plurality of pulverizing chambers. the most forward of said chambers being larger than the one preceding it, a jacket surrounding said casing and affording spaces between said casing and the jacket, means for admitting air to said spaces, said casing being provided with longitudinal openings admitting air from said spaces into said for- Wardmost chamber in direct contact with the material undergoing pulverization, and means for regulating said openings.

JOSEPH MOLZ. 

